BERKELEY — A magnitude 2.4 earthquake was reported underneath the UC Berkeley campus overnight, marking the fourth quake to hit the university area in just over a week.

According to the U.S. Geological Survey, the temblor occurred at 2:42 a.m. near Memorial Stadium, where seismic retrofitting is taking place.

There were no immediate reports of injuries or damage. It follows a 3.6 shaker this past Thursday and two on Oct. 20, when quakes measuring 4.0 and 3.8 struck that afternoon and evening, all of them centering at the campus.